The Election Commission of Thailand (ECT) summarized that by 4 November, three candidates had registered for the Sa Kaeo Constituency 3 by-election. The Economic Party has fielded Sri Sak Sun Sorok to compete for the seat against the prominent Suang Thienthong from the Pheu Thai Party.
On 12 November 2026, the Election Commission of Thailand (ECT) announced the candidate registrations for the by-election in Sa Kaeo’s Constituency 3, covering Aranyaprathet, Ta Phraya, Khok Sung districts, and parts of Watthana Nakhon district (specifically Chong Kum and Chaero subdistricts). Registration opened from 9 to 13 November 2026, between 8:30 a.m. and 4:30 p.m., at the Aranyaprathet District Office in Sa Kaeo Province.
On the fourth day of registration, one new candidate joined: Sri Sak Sun Sorok from the Economic Party, assigned number 3. This brings the total number of candidates to three: Suang Thienthong from Pheu Thai Party with number 1, and Somsak Linla from the New Hope Party with number 2.
Interested candidates can submit their applications with supporting documents and a registration fee of 10,000 baht until 13 November 2026, from 8:30 a.m. to 4:30 p.m. The Election Commission has set Sunday, 6 December 2026, as the voting day for the by-election.